Ball-shaped

The sea urchin has sharp pink spines. The shell is red or mauve, round like a ball but a bit flattened on the bottom and top. The sea urchin's mouth is located underneath its body - with the anus and genitals at the top.

Made of calcium carbonate

A sea urchin consists of calcium carbonate, water and a long intestinal canal.

Meet a sea urchin

If you want to see a sea urchin, you'll need to dive with an oxygen tank. You will have to reach a depth of 10-40 meters. But you may be lucky enough to find a specimen that has washed up onto the beach.